9.8

CVE-2026-46289: linux

CVSS: 9.8v3.1CriticalAnalyzed
AliasesUBUNTU-CVE-2026-46289DEBIAN-CVE-2026-46289
Published 08-06-2026Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2026-46289 is a critical (CVSS 9.8) vulnerability in linux. EPSS estimates a 0.46% chance of exploitation in the next 30 days, higher than 38.6% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.46%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 36 · Related 42
OPENSUSE-SU-2026:11014-1OPENSUSE-SU-2026:21388-1SUSE-SU-2026:22521-1SUSE-SU-2026:22522-1SUSE-SU-2026:22665-1SUSE-SU-2026:22666-1

Timeline

  1. 08-06-2026
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: lib/scatterlist: fix length calculations in extract_kvec_to_sg Patch series "Fix bugs in extract_iter_to_sg()", v3. Fix bugs in the kvec and user variants of extract_iter_to_sg. This series is growing due to useful remarks made by sashiko.dev. The main bugs are: - The length for an sglist entry when extracting from a kvec can exceed the number of bytes in the page. This is obviously not intended. - When extracting a user buffer the sglist is temporarily used as a scratch buffer for extracted page pointers. If the sglist already contains some elements this scratch buffer could overlap with existing entries in the sglist. The series adds test cases to the kunit_iov_iter test that demonstrate all of these bugs. Additionally, there is a memory leak fix for the test itself. The bugs were orignally introduced into kernel v6.3 where the function lived in fs/netfs/iterator.c. It was later moved to lib/scatterlist.c in v6.5. Thus the actual fix is only marked for backports to v6.5+. This patch (of 5): When extracting from a kvec to a scatterlist, do not cross page boundaries. The required length was already calculated but not used as intended. Adjust the copied length if the loop runs out of sglist entries without extracting everything. While there, return immediately from extract_iter_to_sg if there are no sglist entries at all. A subsequent commit will add kunit test cases that demonstrate that the patch is necessary.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.46%

Chance of exploitation in the next 30 days

Percentile

39%

Versus all other CVEs

30-day change

0.00 pp

From 0.46% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.46%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu136 products
  • linux< 6.8.0-134.134 | < 6.17.0-40.40 | < 7.0.0-27.27
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 6.8.0-1060.63 | < 6.17.0-1019.19 | < 7.0.0-1008.8
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 0185846975339a5c348373aa450a977f5242366b, < 3f17500e86d730c76db638bb3ae52f9b5e496c76 | ≥ 0185846975339a5c348373aa450a977f5242366b, < e5e22fc9963469e678c4f4bb38d26adcec107f1e | ≥ 0185846975339a5c348373aa450a977f5242366b, < 8fbba6829057979149d1b37d65690c037f3ddf4d | ≥ 0185846975339a5c348373aa450a977f5242366b, < 9d38756d0a93b66163554219fa9c3365f40c4035 | ≥ 0185846975339a5c348373aa450a977f5242366b, < 07b7d66e65d9cfe6b9c2c34aa22cfcaac37a5c45 | 6.3
  • linux_kernel≥ 6.3, < 6.6.140 | ≥ 6.7, < 6.12.88 | ≥ 6.13, < 6.18.30 | ≥ 6.19, < 7.0.7
Debian1 product
  • linux< 6.12.88-1 | < 7.0.7-1

3 vendors · 139 products

References

39 links
Show all 39 references